Abstract

Liliana Giraldo¹, Juan Carlos Moreno-Pirajan^2*

DOI : http://dx.doi.org/10.13005/ojc/300207

In this work, we report the degradation of NO_x using two catalysts prepared by coating activated carbon from orange peels with TiO₂. This study compared the performance of TiO₂-coated catalysts prepared by CVD (AC1/TiO₂) and the sol-gel method  (AC2/TiO₂). The catalysts were characterized by X-ray diffraction, BET surface area and TEM. The photocatalytic activity was measured by studying the degradation of NO_x in the vapor phase. The results show that the catalyst synthesized by the CVD method was more efficient in the decomposition of NO_x. TEM and XRD revealed the presence of a mixture of the anatase and rutile phases, which favors the NO_x decomposition process. Nitrogen isotherms showed that coating the nanoparticles with titanium oxide did not significantly change the surface area of the original activated carbon.

photocatalysis; activated carbon; isotherms; NOx degradation

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